321201231 has 24 divisors (see below), whose sum is σ = 470330496. Its totient is φ = 194856480.

The previous prime is 321201229. The next prime is 321201239. The reversal of 321201231 is 132102123.

It is not a de Polignac number, because 321201231 - 2¹ = 321201229 is a prime.

It is a super-2 number, since 2×321201231² = 206340461591830722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 321201231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321201239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31536 + ... + 40458.

It is an arithmetic number, because the mean of its divisors is an integer number (19597104).

Almost surely, 2^321201231 is an apocalyptic number.

321201231 is a deficient number, since it is larger than the sum of its proper divisors (149129265).

321201231 is a wasteful number, since it uses less digits than its factorization.

321201231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9023 (or 9010 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 321201231 is about 17922.0877969058. The cubic root of 321201231 is about 684.8451750182.

Adding to 321201231 its reverse (132102123), we get a palindrome (453303354).

The spelling of 321201231 in words is "three hundred twenty-one million, two hundred one thousand, two hundred thirty-one".